12-19. TROUBLESHOOTING CHART (continued).g. GAGES (continued).(1) ENGINE OIL PRESSURE GAGE FAILS TOOPERATE WITH ENGINE RUNNING. All othergages operate properly.Initial Setup:Tools/Test Equipment:Equipment Conditions:•Digital multimeter (DMM) (Item 13, Appendix 1)• MASTER switch set to OFF (refer to• General mechanic’s tool kit (Item 24,TM 9-2350-287-10).Appendix I)•Remove cover from driver’s portableinstrument panel (para 7-6).Materials/Parts:• LockWasher (12) (Item 164, Append H)NOTE• Instead of using multi meterfor voltagecheck, STE/lCEtroubleshooting,INDIVIDUALBATTERY VOLTAGE TEST-TEST89 may be performed.• Instead of using multi meterfor continuity check, STE/ICEtroubleshooting, TEST 91 maybe performd.A. 1. Disconnect wire 27 from engine oil pres-sure gage.2. Place multimeter red lead in wire 27, andground black lead.3. Turn MASTER switch ON (refer to TM 9-2350-287-1O).4. Check for 24 ± 3 vdc.5. Turn MASTER switch OFF (refer to TM 9-2350-287-10).Is voltage indicated?Repair wire 27 or replace harness 12260298 (para 7-7). Verify problem is solved. B. 1. Reconnect wire 27 to gage.2. Disconnect wire 36 from engine oil pres-sure gage.Continued on next page2-99TM 9-2350-287-20-1
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